See Wikipedia. Guadeloupe is an overseas département of France.
There is no "national" railway system.
A tourist service operates on a roughly 2-mile section of former sugarcane line from the sugarcane museum (musée du pays de la canne) at Beauport, near Port Louis. There does not appear to be a website; there is information on a tourism site and a blog post (both French language); a 2019 YouTube video shows the operation.
- gauge: metre
- electrification: none
Timings and contact details may be available at the Fahrplancenter Caribbean page.
Metro and light rail systems